dineshdeshmuk
Full Member level 5
How to connect 12 (U-type) heaters each of 70.6 ohms in delta configuration to 3-phase 380 V supply ?
thanx
thanx
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This way..........
View attachment 66682
This way..........
View attachment 66682
Can we connect them in star configuration also ? If we can then what would be the effect on heating & on load & hence on power consumption ?
what's the output power of these 12 heaters in delta configuration ? as heaters are the pure resistive loads
Yes you can , then Power (delta) = 3 x Power (star) , Look post #7.....
Delta : Resistor voltage = 380V ; R = 70.6 Ohms then P one resistor is 2045 W >> Ptot = 12x2045W = 24.54kW
Star : Resistor voltage = 220V ; R = 70.6 Ohms then P one resistor is 686 W >> Ptot = 12x686W = 8.23kW
when temperature exceeds the set value (SV) the heating stops & blower (3 phase motor) starts to run ?
viewing the terminal box of the motor